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It is an proxy often referred to as proxy server. It is a software that acts as an intermediary between client and server on the internet. Without the use of proxy servers, users could send a request for a resource directly to a server, and it would then serve direct to users. It isn't difficult to understand and implement the use of proxy servers can offer advantages such as improved performance, privacy, security, and so on. As a further layer of pass-through, proxies act as a gatekeeper on the internet, separating clients and servers.




In general, the set of server hardware as well as the software used to install proxy is commonly referred to in the context of proxy servers. This article will concentrate on proxies traditionally understood as software and in connection with web server. This article will give a description of the two main types of proxies, which comprise forward proxy and reverse proxy. forward proxy and reverse proxy. reverse proxy. Each has its own use scenario, which is often misunderstood because of the similar the namesake convention.




This article will give you an understanding of nature of proxies and subtypes, and how they function in typical setups. Through this guide, you'll be able to understand how to recognize the situations where the use of proxies is beneficial and how to choose the correct solution in between reverse and forward proxy, for each situation.



Understanding Forward Proxies



In other words forward proxy also called an open proxy serves as the representative of a customer who would like to make requests via the internet to an originating server. In this case any requests sent by the client are instead transferred to the forward proxy. In this case the forward proxy that is in the place of the client will look into the request. First, it must check if the client is authorised to receive requests from this particular forward proxy. It can then decide whether to deny an request and forward it to its original server. The client doesn't have a direct connection to the internet It can only connect to what the forward proxy allows the client to access.




The most common reason to utilize forward proxy servers is to increase privacy or security online. Forward proxy makes use of the internet instead of a client and could use an alternative IP address that is different from the client's original IP address.




Based on the way it's setup, and how it's set up forward proxy could provide many features and also the ability to:




Beware of ad-tracker.


Circumvent surveillance.


Find restrictions based on your geographical place of residence.




Forward proxies can also be used in systems that offer centralized security and access based on user permissions such as in a workplace. If all internet traffic is routed via an open forward proxy, administrators can grant access only to a few users to the internet filtered through the common firewall. Instead of putting firewalls in place for the client layer that could contain multiple devices with different settings, users, and settings A firewall could be added to this forward proxy layer.




Note that forward proxy server must be manually set up to use to be utilized, whereas reverse proxy servers are able to be not recognized by clients. Based on the fact that the IP address of the client is transferred to the server that originated it via the forward proxy, privacy and anonymity could be provided or rendered clear.




There are many options to look into for forward proxy options:




Apache The Apache is a popular open-source web server that offers forward proxy functions.


Nginx: Another well-known open-source webserver that has forward proxy capabilities.


Squid: A free forward proxy based on the HTTP protocol. Squid doesn't include the full web server. We recommend you read our guide on the best way to create Squid proxy that allows private connections on Ubuntu 20.04.


Dante Forward proxy that makes use of the SOCKS protocol instead of HTTP which makes it more to handle situations like peer-to-peer communication. It's also a good idea to look into how to setup an Dante proxy for private connections using Ubuntu 20.04



Understanding Reverse Proxies



A reverse proxy acts in the role of an intermediary for web servers, which handles the incoming requests of customers on behalf of the server. Web servers can be comprised of one server or multiple servers. Additionally, it can serve in the role of an application server like Gunicorn. In both cases, the request can originate from a user on the internet at large. In most cases, the request will be sent directly to the website server that has the resources the client is in need of. A reverse proxy functions as an intermediary to isolate your website server from any interactions with the internet's public.




From a client's perspective the experience when using reverse proxy is not different from interacting with your webserver directly. It is functionally the same and the user can't tell the difference. Client requests a resource and then receives it, without any additional configuration by the client.




Reverse proxy providers offer features such as:




Centralized security on webservers.


The sending of traffic in accordance with rules you create.


New caching functionality has been added.




While central security is a benefit for both reverse and forward proxy systems, reverse proxy provides this service only to the server layer and not to the client layer. Instead of focusing on maintaining firewalls at the web server layer which may contain several servers that have different configurations, the majority of firewall security could be centered in the reverse proxy layer. In addition, getting rid of the burden of interfacing with firewalls as well as communicating with clients' requests away from web servers permits them to concentrate on meeting the requirements of their customers.




In the case of multiple servers that are behind a reverse proxy, the reverse proxy is also accountable for controlling which requests go to which server. There may be several web servers providing the exact same service, but serving various kinds of resources, or a mix of both. They can use the HTTP protocol like a traditional web server, but they can also be equipped with applications server protocols, like FastCGI. A reverse proxy to send clients to specific servers based on the type of resource they're looking for, or to adhere to specific rules for traffic volume.




Reverse proxies also take advantage of their location on top of web servers, by providing the ability to cache data. Massive static content can be configured using caching rules to prevent hitting web servers with each request. Certain solutions allow you to deliver static content directly without ever touching the server. In addition reverse proxy is capable of compressing these files.




The popular Nginx web server can be described as an effective reverse proxy service. It is true that the Apache web server comes with a reverse proxy, however, it's a separate function of Apache however Nginx was initially designed for and focuses on reverse proxy functions.



Distinguishing Forward Proxy From Proxy Use. and Reverse Proxy Utilization



Because "forward" in addition to "reverse" can be interpreted as directionality and misleading comparisons with "incoming" and "outgoing" traffic. These labels are confusing because both types of proxy are able to handle requests as well as responses. Instead, a better way to differentiate between reverse as well as forward proxies would be to look at the requirements of the app that you're developing.




Reverse proxy is an important feature when designing a solution which can offer web-based services over the internet. They act as your servers whenever you connect to the internet.




Forward proxy can be useful when it is placed in front of users for personal usage, or even in a commercial environment. They represent your clients whenever you use the internet.




A case-based approach to differentiation instead of focusing solely on naming conventions that are similar can prevent confusion.



Conclusion



The article explained what a proxy is as well as the two types of them, namely the forward and reverse proxy. Practical application scenarios as well as an examination of useful features was used to distinguish between forward and reverse proxies. If you're keen to learn more about the possibilities of proxies, you can check out our guide on how to set up Nginx as an internet server and reverse proxy to Apache in the Ubuntu 20.04 server.



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